Telegraph-sounder



(No Model.) 3 SheetsSheet 1,

A. S. KEATING. TELEGRAPH SOUNDER.

Patented Jan. 26, 1886.

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WITNESSES: TNT/'EETOE: jf? 6%. [51% 35 BY ATTORNEYS.

(No Model.) 3 Sheets- Shee1t 2.

A. S. KEATING.

TELEGRAPH SOUNDER.

Patefiteddan. 26,1886.

WITNESSES INVENTOR: I 62 J a? BY at?) ATTORNEYS.

N. Pnzas, PhnlvLilhognphur. Washlngon. n. c.

TELEGRAPH SOUNDER.

Patented Jan. 26, 1886.

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Warren Frames PATENT union.

ALPHONSO S. KEATING, OF COREY, PENNSYLVANIA.

TELEGRAPH-SOUNDER.

fiPECIFIGATION forming part of Letters Patent No. 334,871, dated January 26, 1886.

Application filed January 22, .1885.

To ctZZ whom it may concern.-

Be it known that I, ALPHONSO S. KEATING, of Corry, in the county of Erie and State of Pennsylvania, have invented a new and useful Improvement in Telegraph-Sounders, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved telegraph sounder or instrument which may be used as a telephone when the telegraph-signals cannot be understood readily,or can be used as a telegraph-instrument when the telephonic communcations are rendered indistinct by induction.

- The invention consists in the combination, with a magnet-coil, of a pivoted armature in which a diaphragm is held.

The invention also consists in the construction, arrangement, and combination of various parts and details,as will be fully set forth and described hereinafter.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side view of my improved telegraph -sounder. Fig. 2 is a face view of the same. Fig. 3 is a longitudinal sectional view of the electro'magnet and its armature. Fig. 4 is a diagram showing the combination of the instrument with the key. Fig. 5 is a diagram showing the combination of the instrument with the key and relay.

The board A is held on an arm, A, projecting from the wall, and on the face of the said board two magnet-cores, B and B, are held, which project from a cross-piece,]3. On each core B B" a low resistance-coil, O, wound with wire of the same thickness as that generally used in coils of telegraph instruments, is formed, and in addition to the said coil 0 a coil, D, is formed on each core, the latter coils having a high resistance and being wound with fine wire, such as is usually employed in telephone-instruments. The armature E is ring-shaped, and is provided at its top with an upwardly-projecting tongue, F, and at its bottom with a downwardly-projecting tongue, G, provided with a cross-piece, G, having recesses in its ends for receiving the points of the screws 1, passed through arms 11, pro- Serial No. 153,619. (No model.)

I jecting from the face of the board A, the said screws I being provided with loclon uts I. A spring, J, connected with the tongue G, is secured on a screw, J, screwed into an insulating device, J and the said screw J is provided wit-h a lock-nut,J In the upper tongue, F, of the armature, a screw, F, provided with a loclcnut, F is held, and in the bracketpiece K, into which the tongue F projects, a screw, K, provided with a lock-nut, K", is held. A hammer, L, secured on a rod projecting from the tongue F and through the bracket-piece K, is adapted to strike a bell, L, 011 a suitable standard on the bracketpiece K. A metal diaphragm, M, is held securely in the ring-shaped armature, and in front of the said diaphragm a mouth-pieoe,N, is held on the ring-shaped armature by screws passed through the armature from the back and into the rim of the mouthpiece. The mouth-piece is recessed in the same manner as the mouth-pieces of telephones, is provided with a central aperture, M, and has its back recessed so as not to interfere with the vibrations of the diaphragm M. Line-wires a b are connected with the posts 0 and 1?, provided with the usual lightning-protectors O and P.

Q, R, and S are binding-posts secured on plates, and T is a switch-lever adapted to be brought in contact with the plates of the posts Q R S.

U, V, and W are binding-posts.

U is a spring connected with the post U, and V is a spring connected with the post V, the spring U having a handle to shift it and bring it in contact with the spring V.

Y is a key arranged in the line-wire.

X is a relay, having an armature, X, and Z is a battery. The core B is held opposite the center of the diaphragm, and the core 13 which is shorter than the core B, is opposite part of the inner face of the ring-shaped armature; but it is not so much shorter that when the armature is in contact with the end of the core B the diaphragm will be in contact with the end of the core B. The bottom or lowresistance helices or coils, O, are connected by a wire, 0, with the binding-post R, and the upper or high-resistance helices or coils, D,

are connected by a wire, d, with the bindingpost S. The bottom or low-resistance helices or coils, O, are connected by a wire, e, with the binding-post W, and the posts W and V are connected by wires f and j with the battery Z- The top or high-resistance coils or helices, D, are connected by a wire, 72, with a contact-button, M", which contact-button in turn is connected by the wire 6 with the post 0. \Vhere a relay is used the post Q is connected by a wire, Z, with the relay coil X, which in turn is connected by a wire, m, with the key Y, the said sounder being also connected with the line-wire a. The post V is connected by a wire, a, with the armature X of the relay. The post U is connected by a wire, 15, with the post R, and the post P is connected by a wire, 8, with the pivoted end of the switch-lever T. The post P is grounded.

The operation is as follows: In Fig. 4. lshow the sounder used without the relay. The current passes through the line-wire b in the direction of the arrow to the post P, through the wire 8 to the switch-lever T, which is connected with the post B, through the wire a to the low-resistance coils 0, through the wire 6 to the binding-post W, the wiref, the battery Z, the wire 9, the post V, the spring V, the contactbutton M on which the spring V rests, through the wired to the binding-post 0, then through the line-wire a to the key, and out on the line. The instrument can now be. used as a sounder, in the usual manner, the message being received by means of the sounder, and transmitted by means of the key. The switch-lever T is then placed upon the plate of the post S, as shown in dotted lines, and then the current will pass from the post P through the wire 8, the switch-lever T, the post S, the wire d, the high-resistance coils D, the wire 72-, to the contact-button l to the post 0, and out on the line, without passing through the battery. The spring U is pressed in the direction of the arrow a and brought in contact with the spring V, which is pushed off the contact-button M thus breaking the connection between the spring V and the contact-button 1W, andthus forming a localbattery circuit with the low-resistance coils in circuit, and the result is apolariz ed instrument or sounder. The path of the local circuit thus formed is commencing at spring U, through wire t, plate R, wire a, low-resistance coils 0, wire 6, post WV, wire f, battery Z, wire g, post V, and spring V, back to spring U. When the instrument is in the positionjust described, and is connected to another of like construction and switched correspondingly to the one described, words or sounds produced near or in front of the armatures of either of the instruments will be repeated by the other correspondingly, owing to the fact that the local circuit magnetizes the cores by passing around or through the low-resistance coils O, and causes them to exert a magnetic influence upon the armature. The armature then is in the magnetic field, and is allowed to work free ip this field. It, however, does not make contact at the center with the cores, the thumbscrew F regulating this. The armature then being in the magnetic field, any disturbance of it disturbs the magnetic influence, and as this .1' nfiuence is a part of what the magnet contains, then the whole is changed by the action of the armature. It is a well-known fact that a spool of insulated wire surrounding a mag net, electrical impulses arise from any disturbance of the magnet. Then, since the highresistance coils are upon a magnet, it necessarily follows that any change produced in the magnet will send electrical impulses around the coils and out over the lines and through instruments connected in the circuit, causing in coils or cores of said instruments corresponding changes, which work upon the armatures alike. If desired, a Bell transmitter or other telephonic transmitter may be used at the other end of the line.

In Fig. 5 the sounder is shown combined with the relay. The current comes in through the line-wire b to the post P, through the wire 8, to the pivoted end of the switch-lever T, the free end of which rests on the plate of the binding-post Q. The current then passes through the wire Z to the relay X, the wire m, to the key and to line. When the key is manipulated, the armature of the relay makes and breaks the local circuit and works the sounder. This local circuit is from the post B, through the wire 0, to the low-resistance coils G, the wire 0, the post W, the wiref, the battery Z, the wire 9, the post V, the wire a, the armature of the relay, and back through the wire 19, to the post R. The sounder can now be used in the usual manner. 'The linewire switch T is then placed on the plate of the post S, as shown in dotted lines, and the current will then pass as follows: from the post S, through the wire d, the high-resistance coils D, the button M", the post 0, and from thence to the line, and avoids the relay. The sounder can be polarized by pressing the spring U in the direction of the arrow a,and breaking the contact between the spring V and the button M, or at the armature of the relay with telephonic results,the same as first described in relation to Fig. 4. The linewire switch is placed upon the plate of the post R, and the current then passes through the bottom coils to the line, independent of the relay. The switchlever or key T makes all these changes, and on whichever plate it is placed the other circuits stand open, unless closed by hand or by the relay, as described. The springs U and V always stand apart, except when closed by hand. WVhen they are closed, they make or form the local batterycircuit. The bell L is sounded by the hammer, and is provided to give the signal in case the signal given by the armature cannot be heard. The line-wires are connected with the posts 0 P on the board A, and they in turn are connected by springs with the buttons connected by the wires with the several parts, and thus virtually forming one piece, as described in the specification.

One of the special advantages of my improved instrument is the great facility with which it can be changed from a sounder to a telephonic transmitter or receiver.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a telegraph-sounder, the combination, with a pivoted armature carrying a diaphragm and mouth-piece, of magnet-cores, each having a high and low resistance coil, one core being opposite the center of the diaphragm and the other one opposite theinner face of armature, substantially as herein shown and described.

2. In a telegraph-sounder, the combination, with a pivoted ring-shaped armature carrying adiaphragm and mouth-piece, of magnet-cores of unequal length, each having a high and low resistance coil, and arranged one above the other, with the upper one opposite the center of the diaphragm and the lower one opposite the ring -shaped armature, substantially as herein shown and described.

3. In a telegraph-sounder, the combination, with a pivoted ring-shaped armature, a diaphragm in the same, and a mouth-piece in front of the diaphragm, of magnet-cores each having a high and low resistance coil, contact-points, wires connecting said points to the high and low resistance coils, and a switch-lever con nected to the line-wire, substantially as herein shown and described.

4. In atelegraph-sounder, the combination, with the magnet-cores B B high and low resistance coils O D on each of the said cores, pivoted ring-shaped armature E, and the diaphragm M in said armature, of the bindingposts R S, wires 0 d, connecting said posts to the coils OD, and the pivoted switchlever T, substantially as herein shown and described.

5. In a telegraphsounder, the combination, with magnet-cores and high and low resistance coils on the same, of binding-posts connected with said coils, a pivoted switch-lever connected with thelinc-wire, and springs or levers said posts, a battery, levers for cutting out the battery, and a relay connected with a sounder, substantially as herein shown and described.

7. The combination, with magnet-cores and high and low resistance coils on the same, of the binding-posts R S, connected with the high and low resistance coils, the spring U, connected with the binding-post R, the spring V, connected with the binding-post V, and the contact-button M connected with the highresistance coil and with the line-wire, substantially as herein shown and described.

8. The combination, with the cores B B of which the former is slightly longer than the latter, of the high and low resistance coils C D wound on the same, the pivoted armature E, and the diaphragm M, held in the armature, substantially as herein shown and described.

9. The combination, with the magnet-cores B B and the high and low resistance coils G D wound thereon, of the ring-shaped armature E, provided with the upwardly-projecting tongue F, and the downwardly projecting tongue G, substantially as herein shown and described.

10. The combination, with a support and magnet-cores, each having high and low resistance coils wound thereon, of the pivoted ringshaped armature E, having the tongues F G, the hammer-L on the tongue F, the bracket K, and the bell L on the bracket, substantially as herein shown and described.

' ALPHONSO S. KEATING.

Witnesses:

ALBERT E. WEEKs, JOHN L. KEATING. 

